Elevator.



' No. 729,434. PATENTBDMAY 26; 1903..

A. 0. SMITH.

ELEVATOR.

APPLIUATION nun our. 13, 1902.

' UNITED STATES iatented May 26, 1903.

PATENT OFFICE.

AMOUR COLUMBUS SMITH, OF NEW YORK, N. Y., ASSIGNOR TO MARINE ENGINE AND MACHINE COMPANY, OF HARRISON, NEW JERSEY, A

CORPORATION OF NEW JERSEY.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 729, 134, d t d. May 26, 1903.

Application filed October '13, 1902. Serial No. 127,033. KN mo l- In another application filed concurrently herewith is disclosed an improvement in means for controlling elevators wherein float-' ing sheaves are combined with an endless controlling-rope which travels with the car. The present invention relates also to such controlling means and covers a different arrangement of controlling-rope and floating sheaves, in which the rope is stationary.

The invention will be more fully described hereinafter with reference to the accompanying drawing, in which, for purposes of illustration and explanation, it is embodied, and in which thesingle figure is an outline draw ing illustrating an embodiment of the invention, the well-known devices being indicated conventionally.

The elevator-car a and its hoisting mechanism, represented by a hoisting-rope b, a drum 0, and a motor d, may be constructed and arranged as usual or preferred, the present invention relating to the controlling means only. The controlling-rope in the present case comprises two parts. One'part,

6, may be suitably secured at the top of the shaft, passing thence under a floating sheave f, over a fixed guide-sheave g at the top of the shaft, abouta guide-sheave h on the conductors starting device, such as a lever t' in the car, and overa guide-sheave j on the car to a fixed point'at the bottom of the shaft.

The second part, a, suitablysecured at the.

bottom of theshaft, passes over a floating sheave f, under a fixed guide-sheave g at the bottom of theshaft, abouta guide-sheave h on the conductors starting device in the opposite direction to that of the part 6, and under a guide-sheave j on the car to a fixed point at the top of the shaft. The sheaves h and it, about which the two parts of the controlling-rope pass in opposite directions, "are arranged to be moved by the conductor for the purpose of varying the length of the bights of the ropes, and therefore the position of the floating sheaves in corresponding degree. Any convenient means for effecting movement of the sheaves h and it may be employed, the sheaves being shown in the drawing as mounted upon an ordinarystarting-lever t'.

The floating sheaves f and f are connected together through the medium of the controller devices, and to accomplish this a rope 7c may be attached to the frame of one floating sheave, f, and extended about a guide-sheave Z to one side of the controller, which may be ofany suitable character and is sufliciently indicated by the lever m. A rope is is similarly attached to the frame of the sheave f and extended over a guide-sheave Z to the otherside of the controller m.

It will now be understood that a movement of thestarting device in the car in either direction will cause the guide-sheaves h and h to take up one of the parts of the controllingrope and to pay out the other, the floating sheaves f and f being moved up or down through a length equal to the movement of the sheaves h and h. The movement of the floating sheaves eifects movement of the controller m in the proper direction. Both ends of the two controlling-ropes being fast, the car moves with reference to the ropes, and the bights of the rope travel freely over the guide-sheaves on the car, there being no interference between the movement of'the car and the operation of the controlling-ropes to start or stop or change-the direction of movement of the car. Obviously the starting device, the controller, and other'details of the embodiment of the invention may be parting from the spirit of the invention.

I claim as my invention In an elevator, the comblnation of a car, a

varied as conditions may require without detwo-part controlling-rope, each part having said floating sheaves, substantially as deits ends attached at the top and bottom of the shaft, a starting device on the car having a sheave in a bight of each part, guides on the car to form such bights, guides at the top and bottom of the shaft to form other bights, floating sheaves resting in the last-named bights, and a controller connected to both of scribed. no

This specification signed'and witnessed this 23d day of September, A. D. 1902.

AMOUR COLUMBUS SMITH. In presence of M. A. BRAYLEY, ROSWELL S. NICHOLS. 

